JP3219587B2 - Air register - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air register applied to a commercial or industrial boiler.

[0002]

2. Description of the Related Art An example of a conventional air register for a boiler of this type is shown in FIGS.

FIG. 4 is a sectional view of the entire assembly, and FIG.
FIG. 6 is a front view as viewed in the direction of arrow a, FIG. 6 is a view as viewed in the direction of arrow bb in FIG.
8 is a view as seen from the direction of arrows cc, and FIG. 8 is a view as viewed from the direction of arrows dd in FIG.

In these figures, an air register installed in a burner wind box 01 is composed of a primary air cylinder 02, a secondary air cylinder 03, and a tertiary air cylinder 04 provided on the same circle.

[0005] A burner-like box 0
The combustion air 13 sent to the primary air passage 1 has its flow rate adjusted by the primary air ring damper 05 and the primary air passage 1
The secondary air swirl vane 08 is adjusted in the flow rate by the primary air 14 sent to the secondary air 0 and the secondary air slide damper 06.
And the secondary air 15 and the tertiary air slide damper 0 fed into the secondary air passage 11
After the flow rate is adjusted by 7, the tertiary air 16 is divided into three tertiary airs 16 sent into the tertiary air passage 12.

[0006] The primary air 14 sent into the primary air passage 10 is swirled by the primary air swirler 09 provided at the outlet of the primary air passage 10 and blown into the furnace 24.

The secondary air 15 sent into the secondary air passage 11 is swirled from the outlet of the secondary air passage 11, and the tertiary air 16 is sent from the outlet of the tertiary air passage 12 into the furnace 24.
Is blown into

In the primary air cylinder 02, a swirler 0 for primary air is provided.
9, a burner gun 17 is mounted.

The burner gun 17 is connected to the liquid fuel 20 sent from the fuel supply device (not shown) to the burner gun 17 through the fuel line 18 and the spray medium line 1 separately.
The mixture is mixed with a spray medium 21 such as steam or air sent through the furnace 9 and sprayed into a furnace 24 as a spray jet 22.

The spray jet 22 injected into the furnace 24 is ignited by an ignition source (not shown),
Form 3

The primary air 14 is used for combustion near the ignition portion of the flame 23, the secondary air 15 is used for combustion of the entire flame 23 mainly, and the tertiary air 16 is used for combustion after the tip of the flame 23. Provided.

With such an air register, the combustion air 13 is
Are distributed to the air passages 10, 11, and 12 by adjusting the openings of the dampers 05, 06, and 07 provided at their inlets.

Each of the air tubes 14, 15, 16 is connected to each of the air cylinders 02,
The air is fed from the air inlets opened at the inlets 03 and 04.

The air inlets are opened over the entire circumference of each of the air cylinders 02, 03, and 04, and each of the air 14, 15, and 1 is opened.
6 flows into the respective air passages 10, 11, 12 from a direction of 360 degrees.

Each of the dampers 05, 06, 07 for adjusting the flow rates of the airs 14, 15, 16 is cylindrical, and is mounted outside the air inlets opened at the inlets of the air cylinders 02, 03, 04. Have been.

[0016]

In the conventional air register as described above, the secondary air slide damper 06 and the tertiary air slide damper 07 become large-diameter cylindrical dampers, in particular, outside the burner wind box 01. When the operation is performed from the above, the movement of the damper is likely to be deviated, and the opening area of the air inlet becomes difficult to be uniform.

As a result, the secondary air 15 and the tertiary air 16
Since the flow rate becomes unbalanced in the respective air passages 11 and 12 and is blown into the furnace 24 as it is, there is a problem that combustion deteriorates.

Further, these dampers 06 and 07 are large and heavy, and require a large force for operation. Therefore, there is a problem that deformation occurs due to thermal expansion or the like with the passage of time and the damper operation becomes difficult.

The present invention solves the above-mentioned disadvantages of the conventional apparatus, prevents each air blown into the furnace from each air passage outlet from causing a drift at each air passage outlet, and controls each damper to operate the same. It is an object of the present invention to provide a new air register in which the force required for the air register can be made as small as possible and the structure can be used for a long time.

[0020]

According to the present invention, an air register is provided on a furnace wall of a boiler or the like, and blows combustion air pumped by a blower into the furnace. A plurality of concentric circles that take in combustion air from all around and blow out the combustion air from a plurality of circular and annular air passages formed on concentric circles. And a butterfly damper for adjusting the distribution of the amount of air blown from each nozzle is arranged facing the partial air intake opening provided on the circumference of each air passage inlet. It is built-in.

[0021]

According to the air register of the present invention constructed as described above, the primary, secondary and tertiary air cylinders provided in the burner wind box on the same center of the air register are partially provided with air intake openings. A square-shaped air intake duct is installed in each of the openings, and a butterfly-shaped damper for adjusting the air flow rate with a simple structure is mounted on the air-intake duct. I did it.

Further, since each of the air flow rate adjusting dampers has a compact structure, each air passage can be lengthened, the approach section of each air can be sufficiently secured, and the drift of each air can be eliminated.

[0023]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall assembly sectional view of an air register according to one embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG.
1 shows a sectional view taken along the line BB in FIG.

In these figures, an air register installed in a burner wind box 101 installed on a furnace wall of a boiler or the like includes a primary air cylinder 102, secondary air cylinders 103 and 3 provided on the same center of circle. It is composed of a secondary air cylinder 104.

The interior of the primary air cylinder 102 is the primary air passage 11
An annular passage formed by the primary and secondary air cylinders 102 and 103 is a secondary air passage 111.

Primary air passage 110 and secondary air passage 111
Is enclosed by a cylinder and has a common cylindrical air chamber 1
29 are formed.

In the cylindrical air chamber 129, a plurality of butterfly dampers are provided at symmetric positions on the circumference of the entrance. This is the primary / secondary air flow rate adjusting damper 106.

A burner-like box 1
A part of the combustion air 113 sent to 01 flows into the cylindrical air chamber 129 through the primary / secondary air flow rate adjusting damper 106.

The primary air cylinder 102 in the cylindrical air chamber 129
Is provided with a plurality of butterfly dampers on the circumference. This is the primary air flow rate adjustment damper 105.

The secondary air cylinder 103 in the cylindrical air chamber 129
Is provided with a secondary air swirl vane 108.

The combustion air 113 sent into the cylindrical air chamber 129 flows into the primary air passage 110 through the primary air flow control damper 105, and the primary air 114 flows into the primary air passage 110.
Secondary air passage 111 through secondary air swirl vane 108
Into the secondary air 115 flowing into the air.

The distribution of the flow rate between the primary air 114 and the secondary air 115 is performed by a primary air flow rate adjusting damper 105.

An annular passage formed by the secondary air cylinder 103 and the tertiary air cylinder 104 is a tertiary air passage 112.

In the tertiary air cylinder 104, a plurality of butterfly dampers are provided on the circumference at symmetric positions adjacent to the cylindrical air chamber 129. This is the tertiary air flow control damper 107.
It is.

The remaining combustion air 113 sent to the cylindrical air chamber 129 out of the combustion air 113 sent to the Pana wind box 101 passes through the tertiary air flow control damper 107 as tertiary air 116. Next air passage 112
Sent to

The primary air flow rate adjusting damper 105, primary
Each of the secondary air flow rate adjustment damper 106 and the tertiary air flow rate adjustment damper 107 is formed by a plurality of butterfly-shaped dampers, but these butterfly-shaped dampers are not shown, but are linked by a link mechanism. The flow rate of each air 114, 115, 116 can be adjusted by operating one butterfly damper.

The air flow rate adjusting dampers 105, 106,
Since each of the air passages 110 and 1 is made compact,
11 and 112 can be lengthened, primary air 114, secondary air 1
The approach section of the 15th and tertiary air 116 can be sufficiently secured.

Therefore, each of the air passages 110, 111, 11
The non-uniform flow of the air 114, 115, 116 at the two outlets is eliminated, and the combustibility in the furnace 124 is improved.

Reference numeral 109 denotes a swirler for primary air, 117
Is a burner gun, 118 is a fuel line, 119 is a spraying medium line, 120 is a fuel, 121 is a spraying medium, 122 is a spray jet, and 123 is a flame. I do.

Numeral 125 is a damper operating rod for adjusting the primary air flow rate, 126 is a damper operating rod for adjusting the primary and secondary air flow rates, 127 is a damper operating rod for the secondary air swirl vane, 12
Reference numeral 8 denotes a damper operation rod for adjusting a tertiary air flow rate.

Next, the operation of the present apparatus will be described.
Combustion air 11 sent into burner wind box 101
Numeral 3 flows into the air register from the primary / secondary air flow rate adjusting damper 106 and the tertiary air flow rate adjusting damper 107.

The combustion air 113 flowing from the primary / secondary air flow control damper 106 is supplied to the primary flow control damper 1.
05 is sent as primary air 114 as primary air passage 110 and the remaining combustion air 113 is
5 is fed into the secondary air passage 111 through the secondary air swirl vane 108.

The combustion air 113 flowing from the tertiary air flow rate adjusting damper 107 reaches the tertiary air passage 112 as tertiary air 116.

The primary air 114 is blown into the furnace 124 from the primary air passage 110 through the primary air swirler 109.

The secondary air 115 is the secondary air swirl vane 10
8 causes a swirling flow to be blown into the furnace interior 124 from the secondary air passage 111.

The tertiary air 116 is sent from the tertiary air flow rate adjusting damper 107 to the tertiary air passage 112 and blown into the furnace 124.

The air flow rate adjusting dampers 105, 106,
Reference numeral 107 denotes a butterfly type damper having a simple structure.
Can be operated automatically or manually from outside.

These dampers 105, 106, 107
Is constituted by a plurality of butterfly dampers symmetrically provided on the circumference of each of the air cylinders 102, 103, 104, respectively.

The plurality of butterfly dampers are linked to each other by a link mechanism.
The adjustment of the flow rate of each of the dampers 105, 106, 10
7 is operated by operating one of the butterfly dampers.

The primary air 114, the secondary air 115, and the tertiary air 11 flowing into each of the air passages 110, 111, 112
6 shows that each of the air passages 110, 11 is formed by converting each of the air flow rate adjusting dampers 105, 106, 107 into a compact.
1,112, each air 114,115,116
The runway can be prevented because the runway section can be sufficiently secured.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various design changes are possible within the scope of the technical idea of the present invention. It belongs to the technical scope of the present invention.

[0052]

As described above, according to the air register of the present invention, in the air register configured to take in combustion air from all around and have a plurality of air passages on a concentric circle, A simple damper for air flow adjustment such as a butterfly damper for taking in a predetermined amount of air is arranged facing the partial air intake opening provided on the circumference of each air passage inlet. The air flow rate can be easily adjusted and the durability is improved.

Further, by making the damper for adjusting the air flow rate compact, each air passage can be lengthened, and the run-up section of each air flow can be sufficiently secured, so that the drift of each air flow blown into the furnace is eliminated.

[Brief description of the drawings]

FIG. 1 is an overall sectional side view of an air register according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a sectional side view of the entire air register of the related art.

FIG. 5 is a front view as viewed in the direction of arrows aa in FIG. 4;

FIG. 6 is a sectional view taken along the line bb in FIG. 4;

FIG. 7 is a sectional view taken along the line cc of FIG. 4;

FIG. 8 is a sectional view taken along the line dd in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Burner wind box 102 Primary air cylinder 103 Secondary air cylinder 104 Tertiary air cylinder 105 Primary air flow rate adjustment damper 106 Primary / secondary air flow rate adjustment damper 107 Tertiary air flow rate adjustment damper 108 Secondary air Swirl vane 109 primary air swirler 110 primary air passage 111 secondary air passage 112 tertiary air passage 113 combustion air 114 primary air 115 secondary air 116 tertiary air 117 burner gun 120 fuel 121 spray medium 123 flame 124 furnace 129 cylindrical air chamber

Continued on the front page (72) Inventor Satoru Fukui 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Masaharu Oguri 5-717-1, Fukahoricho, Nagasaki-shi Nagaishi Engineering Co., Ltd. (56) References JP-A-62-276309 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23L 1/00 F23C 11/00 F23D 11/24

Claims (1)

(57) [Claims] 1. An air register installed on a furnace wall of a boiler or the like and blown into a furnace for combustion air blown by a blower to supply the combustion air from all around. It is configured to have a plurality of concentric nozzles that blow in the combustion air from a plurality of circular and annular air passages that are taken in and formed concentrically, and adjust the distribution of the amount of air blown from each nozzle. An air register, wherein a butterfly-shaped damper is provided and built in facing a partial air intake opening provided on the circumference of each air passage inlet.